GNU_Radio
GNU radio is a free/open-source software toolkit for and the content is controlled by a handful of organizations. Cell
building software radios, in which software defines the phones are a great convenience, but the features your phone
transmitted waveforms and demodulates the received supports are determined by the operator s interests, not yours.
waveforms. Software radio is the technique of getting code A centralized system limits the rate of innovation. Instead of
as close to the antenna as possible. It turns radio hardware cell phones being second-class citizens, usable only if
problems into software problems.
This application note considers the design of frequency-
selective filters, which modify the frequency content
and phase of input signals according to some specification.
Two classes of frequency-selective digital filters
are considered: infinite impulse response (IIR) and finite
impulse response (FIR) filters. The design process
consists of determining the coefficients of the IIR or FIR
filters, which results in the desired magnitude and
phase response being closely approximated.
This application note considers the design of frequency-
selective filters, which modify the frequency content
and phase of input signals according to some specification.
Two classes of frequency-selective digital filters
are considered: infinite impulse response (IIR) and finite
impulse response (FIR) filters. The design process
consists of determining the coefficients of the IIR or FIR
filters, which results in the desired magnitude and
phase response being closely approximated.
Run following Matlab commands to make sure the installation worked correctly.
Unlike query function, filterdb does not load all waveforms to memory but returns filtered database object. This is useful when the resulting set of the query is too big to fit in memory. Consequent calls to read function can be made to read content of this filtered database object.
We are providing the best information available to us as at date of writing and intend to update it at
frequent intervals as things change and/or more information becomes available. However we intend this
Q&A as a guide only and recommend that users obtain specific information to determine applicability to
their specific requirements. (This is another way of saying that we can t be held liable or responsible for
the content.)
Title : Implementation of quadrature modulation and demodulation
Design Object : By implementing quadrature modulation and demodulation of analog signals in digital signal processing, students will have better understanding of sampling and frequency analysis of discrete-time signals.
Design Content : Make a MATLAB function which performs quadrature modulation and demodulation for a input signal with anti-aliasing filtering.
Main program running when workpiece is ready on deferent belt(deferent_ready=ture).
* Call Square_Wave subroutine to generate 0.5ms square wave on P1.2 to drive
* electromotor,then drive deferent belt step forward. When it steps to the measure
* zone, it stops to be measured. Then call A_D subroutine to transform analog
* signals to digital signals , after then call serial subroutine to transfer
* digital signals to PC. Call square wave subroutine to drive deferent belt step to
* original position waitting for defere ready flag to run the next circle.
The Java Platform, Enterprise Edition 5 (Java EE 5) has two different but complementary
technologies for producing dynamic web content in the presentation tier—namely Java
Servlet and JavaServer Pages (JSP).
Java Servlet, the first of these technologies to appear, was initially described as extensions
to a web server for producing dynamic web content. JSP, on the other hand, is a newer technology
but is equally capable of generating the same dynamic content. However, the way in
which a servlet and a JSP page produce their content is fundamentally different servlets
embed content into logic, whereas JSP pages embed logic into content.
